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Expired Canadian patentCanada

Network data distribution system

CA 2196622 C · Owner: Ito, Tatsuaki · Inventors: Jinzenji, Hiroshi; Ito, Tatsuaki; Tajiri, Tetsuo

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A network data distribution system which is operated under circumstances, affected by external or internal factors without discontinuing a data distribution service while being adapted to the present situation is provided. In the server (1) side of the system, data requested from a client are divided into packets and packet, data is formed by adding a time index and in the client (2) side, an amount of transmission or processing delay is calculated based on the time index included in the received packet data, and delay time information based on the calculated result is communicated. The server side selects the packet data to be next transmitted based on the communicated delay time …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed February 3, 1997 and granted October 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 3, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 3, 1997
GrantedOctober 16, 2001
Term endedFebruary 3, 2017
Patent numberCA 2196622 C
Classification (IPC)H04L29/06

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedFeb 3, 1997Patent grantedOct 16, 2001Term endedFeb 3, 2017

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.